Ruh, N. and Cooper, Richard P. and Mareschal, Denis (2008) The hierarchies and systems that underlie routine behavior: evidence from an experiment in virtual gardening. In: Love, B.C. and McRae, K. and Sloutsky, V. (eds.) Proceedings of the 30th International Conference of the Cognitive Science Society. The Cognitive Science Society, pp. 339-344. ISBN 9780976831846.